yu gi oh hero deck Structure Deck: Birth of THE BEST Elemental Hero Decks

Currently going for around $30.00, this card might be overshadowed by other great trainer cards in the Lost Origin set

These are classified as Secret Rare cards which include the below Gold Secret Rare Cards, Rainbow Rare Pokmon Cards, and, finally, Rainbow Rare Trainer Supporter cards

Thankfully this works on far more than just clues, making this a surprisingly useful card that lots of decks can use

Of course, all that's if I kept track of everything in my head correctly.

The Mirage design team (Bill Rose, Joel Mick, Charlie Catino, Don Felice, Howard Kahlenberg, and Elliot Segal) while working on Visions ended up creating enters-the-battlefield effects as well, but I hadn't yet seen the cards when I created Gravedigger